The part number for a 7 hole neutral link with covers , that will accept 1 x 70mm and 3 x 35mm cables is - L7/150
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500V 370A 7 Hole Front Wiring Neutral Link. Black base and cover.
Dimensions: 162 x 53 x 55mm.
2 tunnels, 17mm diameter accommodate 150mm2 cable.
1 tunnel, 15.5mm diameter accommodate 120mm2 cable.
2 tunnels, 10mm diameter accommodate 50mm2 cable.
2 tunnels, 5.9mm diameter accommodate 16mm2 cable.